Coffee machine



FIG. 1 is a front perspective view of a coffee machine showing our new design;

FIG. 2 is another front perspective view thereof;

FIG. 3 is a rear perspective view thereof;

FIG. 4 is a front perspective view thereof in opened position;

FIG. 5 is a left side view thereof, in closed position;

FIG. 6 is a front view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a back view thereof;

FIG. 9 is a top plan view thereof; and,

FIG. 10 is a bottom view thereof. 

The ornamental design for a coffee machine, as shown and described. 